题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005349-40373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005349-62518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005349-85567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005350-64576.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005350-51008.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005350-68555.png)
(Ⅰ)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005350-82922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-82109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-30127.png)
(Ⅱ)若点
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-12744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-12105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005349-62518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005349-85567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-26010.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-42675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-66294.png)
解析
试题分析:(Ⅰ)求证:平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005350-82922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-82109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-30127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-93966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-27697.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005350-82922.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-82109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-30127.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-12744.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005351-12105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005349-62518.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005349-85567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-26010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-79870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-54907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-24512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-76241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005354-76780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005354-41288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-26010.png)
试题解析:(Ⅰ)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005354-29717.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005354-81900.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005355-90502.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005355-93397.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005355-92176.png)
又
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005355-60054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005355-16177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005356-55441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005356-14331.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005356-46550.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005356-17960.png)
(Ⅱ)建立以
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-79870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-54907.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-24512.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005353-76241.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005354-76780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005354-41288.png)
设平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005357-89898.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005357-11126.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005357-58968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005358-58454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005358-84049.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005358-41077.png)
设平面
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005358-78581.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005358-86794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005357-58968.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005359-43183.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005359-94592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005359-29469.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005400-99477.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005400-88559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-42675.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005352-66294.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005342-70054.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005343-58709.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005343-30649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005343-58709.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005343-92417.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005343-50759.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005344-53458.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005344-82756.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005344-95662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005344-53334.png)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005325-80783.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005325-19035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005326-36105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005326-79066.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005326-76041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005325-19035.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005326-39803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005326-62873.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005327-84038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005327-12296.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005327-62793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005327-90701.png)
(Ⅰ)证明:直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005328-98521.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005328-58517.png)
(Ⅱ)求异面直线
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005328-97718.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005328-12390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005310-59627.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005310-36934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005310-71074.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005310-36934.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005311-32310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005311-24283.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005311-17149.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005311-35508.jpg)
(1)证明:
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005312-51568.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005312-41390.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005312-77192.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005301-51328.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005301-75977.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005301-60547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005302-38086.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005302-64477.png)
A.![]() | B.(2,4) | C.![]() | D.(-1,-1) |
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005252-40739.png)
(Ⅰ)求异面直线EF与BC所成角的大小;
(Ⅱ)若二面角A-BF-D的平面角的余弦值为
![](http://img.shitiku.com.cn/uploads/allimg/20191106/20191106005253-81717.png)
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